Red Hat DIRECTORY SERVER 2.0 - GATEWAY Manual de usuario descargar pdf (Pagina 62)

Chapter 7. Logging

The three commands that specify how often rotation should take place are daily,

weekly and monthly.

rotate 4

Keep four sets of log ﬁles. The comment is slightly inaccurate; four weeks’ worth

of logs will be kept if rotation is done weekly. If rotation is done daily then this

command means that four days’ worth of logs are kept.

create

After moving the main log ﬁle from logfile to logfile.1 a new, empty

logfile should be created.

include /etc/logrotate.d

This command instructs the log rotation program to read in every ﬁle in this

directory. One of these ﬁles will correspond to the web server’s log ﬁles.

/var/log/httpd/*log {

missingok

notifempty

sharedscripts

postrotate

/bin/kill -HUP ‘cat /var/run/httpd.pid 2>/dev/null‘ 2> /dev/null || true

endscript

}

Figure 7-16. /etc/logrotate.d/httpd

The /etc/logrotate.d/httpd ﬁle (part of the httpd package), not the logrotate

package, contains the instructions speciﬁc to the web server logs.

/etc/logrotate.d/httpd: commands

/var/log/httpd/*log { ... }

This speciﬁes that the commands within the curly brackets are to be applied to

all the ﬁles that match the expression /var/log/httpd/*log.

missingok

This is the instruction not to return an error if a particular log ﬁle is not present.

notifempty

This command instructs the system not to rotate the logs if the current main log

ﬁle is empty. See the discussion below about whether this is a good idea or not.

sharedscripts

Further down we will see a shell script that will be run after the rotatiopn has

happened. This command instructs the system to run that script only once after

all the ﬁles matching /var/log/httpd/*log have been rotated and not after

each individual rotation.

postrotate ... endscript

Following the rotation of a log ﬁle (or all of them if sharedscripts is invoked)

the commands between postrotate and endscript are run. This rotation program

runs as root so care must be taken with the commands that appear here.

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Red Hat DIRECTORY SERVER 2.0 - GATEWAY Manual de usuario Pagina 62